Homework Help: physics EM repost

Posted by Spencer on Monday, March 31, 2008 at 2:15pm.

Magnetic resonance imaging needs a magnetic field strength of 1.5 T. The solenoid is 1.8 m long and 75 cm in diameter. It is tightly wound with a single layer of 2.50-mm-diameter superconducting wire.

What size current is needed?

Thanks in advance

physics EM repost - bobpursley, Monday, March 31, 2008 at 3:04pm
http://www.pa.msu.edu/courses/2001spring/PHY232/lectures/ampereslaw/solenoid.html

all you have to figure is the number of turns, you are given diameter and length.
- physics EM repost - Spencer, Monday, March 31, 2008 at 3:07pm
  to find N is it L/2d? length being length of solenoid and d is diameter of the wire or solenoid?
  - physics EM repost - Spencer, Monday, March 31, 2008 at 4:03pm
    ok i got it finally. thanks
physics EM repost - bobpursley, Monday, March 31, 2008 at 4:23pm
good. but actually, N=L/d

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